09-2 Frogs

Analysis of FrogID data from TidyTuesday

FrogID is an Australian frog call identification initiative. The FrogID mobile app allows citizen scientists to record and submit frog calls for museum experts to identify. Since 2017, FrogID data has contributed to over 30 scientific papers exploring frog ecology, taxonomy, and conservation.

library(maps)
library(tidyverse)
library(plotly)

frogID_data <- readr::read_csv('https://raw.githubusercontent.com/rfordatascience/tidytuesday/main/data/2025/2025-09-02/frogID_data.csv') |> 
  mutate(month = month(eventDate),
         season = case_when(
           month %in% c(12, 1, 2) ~ "winter",
           month %in% c(3, 4, 5) ~ "spring",
           month %in% c(6, 7, 8) ~ "summer",
           month %in% c(9, 10, 11) ~ "fall"
         ))
frog_names <- readr::read_csv('https://raw.githubusercontent.com/rfordatascience/tidytuesday/main/data/2025/2025-09-02/frog_names.csv')

all_frogs <- frogID_data |>
  left_join(frog_names, by = "scientificName") |> 
  mutate(genus = stringr::str_extract(scientificName, "^\\w+"))

library(Polychrome)
mycols <- createPalette(26, c("#ff0000", "#00ff00", "#0000ff"))
names(mycols) <- all_frogs |> select(genus) |> unique() |> pull()

australia_map <- maps::map(database = "world", region = "Australia",
                     plot = FALSE)

ggplot(data = australia_map, 
       aes(x = long, y = lat, group = group)) +
  geom_polygon(fill = "white", color = "blue") + 
  geom_point(data = all_frogs,
             aes(x = decimalLongitude, 
                 y = decimalLatitude, 
                 color = genus),
             size = 1,
             inherit.aes = FALSE) +
  theme_minimal() +
  ggtitle("Frogs in Australia: 2023") + 
  facet_wrap(~season) + 
  labs(x = "", y = "") +
  scale_color_manual(values = mycols)

p <- ggplot(data = australia_map, 
       aes(x = long, y = lat, group = group)) +
  geom_polygon(fill = "white", color = "blue") + 
  geom_point(data = all_frogs,
             aes(x = decimalLongitude, 
                 y = decimalLatitude, 
                 color = genus),
             size = 1,
             inherit.aes = FALSE) +
  theme_minimal() + 
  theme(
        panel.background = element_rect(fill = "lightsteelblue"), 
        panel.grid.major = element_line(color = "lightsteelblue"), 
        panel.grid.minor = element_line(color = "lightsteelblue2"), 
        axis.text = element_text(color = "black"),      
        axis.title = element_text(color = "black") ) +
  ggtitle("Frogs in Australia: 2023") + 
  facet_wrap(~season) + 
  labs(x = "", y = "") +
  scale_color_manual(values = mycols)
  
  
ggplotly(p, tooltip = "genus")